20100200000121 has 24 divisors (see below), whose sum is σ = 29972063154176. Its totient is φ = 12967060763520.

The previous prime is 20100200000119. The next prime is 20100200000123. The reversal of 20100200000121 is 12100000200102.

It is an interprime number because it is at equal distance from previous prime (20100200000119) and next prime (20100200000123).

It is not a de Polignac number, because 20100200000121 - 2¹ = 20100200000119 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20100200000123) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2239041 + ... + 6724113.

Almost surely, 2^{20100200000121} is an apocalyptic number.

It is an amenable number.

20100200000121 is a deficient number, since it is larger than the sum of its proper divisors (9871863154055).

20100200000121 is a wasteful number, since it uses less digits than its factorization.

20100200000121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4501173 (or 4501170 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

Adding to 20100200000121 its reverse (12100000200102), we get a palindrome (32200200200223).

The spelling of 20100200000121 in words is "twenty trillion, one hundred billion, two hundred million, one hundred twenty-one", and thus it is an aban number.